351  
FNCA52 TJSJ 190754  
FWFSJU  
 
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO  
NATIONAL WEATHER SERVICE SAN JUAN PR  
354 AM AST SUN MAY 19 2019  
   
DISCUSSION
 
ALTHOUGH RELATIVE HUMIDITIES ARE FORECAST TO REACH  
THE MID 40% TODAY ACROSS PORTIONS OF THE SOUTH COAST OF PUERTO  
RICO...A MOIST SOUTHEASTERLY WIND FLOW WILL BRING SHOWERS LATER  
THIS MORNING ACROSS THE SOUTHEASTERN SECTIONS OF THE ISLAND. THEN  
IN THE AFTERNOON, DIURNALLY INDUCED SHOWERS AND THUNDERSTORMS ARE  
EXPECTED TO DEVELOP OVER THE INTERIOR AND NORTHWEST SECTIONS OF  
THE ISLAND. WINDS ARE FORECAST TO REMAIN AT 15 MPH OR LESS.  
THEREFORE, A LOW FIRE WEATHER DANGER IS EXPECTED TODAY.  
 
PRZ014-200800-  
SOUTHEAST COASTAL PLAINS-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 30 30  
TEMP (24H TREND) 93 (+3) 72 (0) 91  
RH % (24H TREND) 43 (-6) 91 (0) 50  
20FTWND-VAL/AM(MPH) E 10 E 9  
20FTWND-RDG/PM(MPH) SE 11 E 6 SE 12  
MIXING HGT(FT-AGL/MSL)5939 5118  
TRANSPORT WND (MPH) SE 13 SE 14  
VENT RATE (KT-FT) 64731 61496  
DISPERSION 5 5  
DSI 6 3 6  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ015-200800-  
SOUTHERN HILLS-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 20 30 40  
TEMP (24H TREND) 88 (+3) 69 (-2) 88  
RH % (24H TREND) 49 (-3) 95 (+3) 55  
20FTWND-VAL/AM(MPH) E 10 SE 9  
20FTWND-RDG/PM(MPH) SE 10 E 6 SE 11  
MIXING HGT(FT-AGL/MSL)5991 5239  
TRANSPORT WND (MPH) SE 12 SE 13  
VENT RATE (KT-FT) 61112 59205  
DISPERSION 5 5  
DSI 6 3 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ016-200800-  
NORTH COASTAL PLAINS-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 40 30 50  
TEMP (24H TREND) 92 (+3) 74 (-1) 90  
RH % (24H TREND) 49 (-5) 88 (0) 56  
20FTWND-VAL/AM(MPH) E 9 E 7  
20FTWND-RDG/PM(MPH) E 10 SE 6 E 9  
MIXING HGT(FT-AGL/MSL)5535 4784  
TRANSPORT WND (MPH) E 10 SE 10  
VENT RATE (KT-FT) 58891 54304  
DISPERSION 5 5  
DSI 6 4 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ017-200800-  
NORTHERN HILLS-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 70 20 60  
TEMP (24H TREND) 88 (+1) 71 (-1) 88  
RH % (24H TREND) 52 (-2) 94 (+1) 59  
20FTWND-VAL/AM(MPH) E 8 E 6  
20FTWND-RDG/PM(MPH) NE 6 LGT/VAR E 6  
MIXING HGT(FT-AGL/MSL)5495 4615  
TRANSPORT WND (MPH) SE 9 SE 8  
VENT RATE (KT-FT) 56865 50382  
DISPERSION 5 5  
DSI 6 2 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ018-200800-  
WEST COAST-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 20 20 50  
TEMP (24H TREND) 90 (+2) 73 (-1) 89  
RH % (24H TREND) 49 (-5) 88 (0) 55  
20FTWND-VAL/AM(MPH) SE 9 E 7  
20FTWND-RDG/PM(MPH) E 9 LGT/VAR E 10  
MIXING HGT(FT-AGL/MSL)6091 5379  
TRANSPORT WND (MPH) SE 9 SE 10  
VENT RATE (KT-FT) 62267 60776  
DISPERSION 5 5  
DSI 6 3 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ019-200800-  
EASTERN INTERIOR-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 30 40 30  
TEMP (24H TREND) 90 (+3) 71 (-2) 88  
RH % (24H TREND) 49 (-4) 94 (+3) 57  
20FTWND-VAL/AM(MPH) SE 9 SE 9  
20FTWND-RDG/PM(MPH) SE 10 SE 5 SE 11  
MIXING HGT(FT-AGL/MSL)5536 4569  
TRANSPORT WND (MPH) SE 13 SE 14  
VENT RATE (KT-FT) 57703 57720  
DISPERSION 5 5  
DSI 6 3 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ022-200800-  
LUQUILLO MOUNTAIN RANGE-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 40 30  
TEMP (24H TREND) 85 (+3) 68 (-4) 84  
RH % (24H TREND) 59 (-2) 95 (+5) 65  
20FTWND-VAL/AM(MPH) SE 9 SE 10  
20FTWND-RDG/PM(MPH) SE 10 E 6 SE 11  
MIXING HGT(FT-AGL/MSL)4924 4075  
TRANSPORT WND (MPH) SE 13 SE 15  
VENT RATE (KT-FT) 54714 52868  
DISPERSION 5 5  
DSI 6 5 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ023-200800-  
CENTRAL MOUNTAIN RANGE-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 40 20 60  
TEMP (24H TREND) 87 (+5) 67 (-1) 86  
RH % (24H TREND) 54 (+1) 98 (+2) 59  
20FTWND-VAL/AM(MPH) SE 9 SE 8  
20FTWND-RDG/PM(MPH) SE 8 LGT/VAR SE 9  
MIXING HGT(FT-AGL/MSL)5936 4979  
TRANSPORT WND (MPH) SE 10 SE 10  
VENT RATE (KT-FT) 60707 50907  
DISPERSION 5 5  
DSI 5 2 5  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ024-200800-  
CAYEY MOUNTAIN RANGE-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 40 30  
TEMP (24H TREND) 86 (+3) 69 (-3) 84  
RH % (24H TREND) 53 (-1) 96 (+5) 60  
20FTWND-VAL/AM(MPH) E 9 SE 10  
20FTWND-RDG/PM(MPH) SE 10 SE 5 SE 11  
MIXING HGT(FT-AGL/MSL)5360 4399  
TRANSPORT WND (MPH) SE 13 SE 15  
VENT RATE (KT-FT) 57337 56360  
DISPERSION 5 5  
DSI 6 3 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ025-200800-  
VIEQUES-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 30  
TEMP (24H TREND) 86 (+1) 77 (-2) 84  
RH % (24H TREND) 63 (-3) 86 (+4) 66  
20FTWND-VAL/AM(MPH) E 11 SE 13  
20FTWND-RDG/PM(MPH) SE 11 E 11 SE 11  
MIXING HGT(FT-AGL/MSL)3130 2724  
TRANSPORT WND (MPH) E 15 SE 16  
VENT RATE (KT-FT) 39920 37661  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ026-200800-  
CULEBRA-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 30  
TEMP (24H TREND) 86 (+1) 77 (-2) 86  
RH % (24H TREND) 63 (-5) 86 (+4) 65  
20FTWND-VAL/AM(MPH) E 13 SE 14  
20FTWND-RDG/PM(MPH) E 12 E 11 E 13  
MIXING HGT(FT-AGL/MSL)2666 2577  
TRANSPORT WND (MPH) SE 16 SE 16  
VENT RATE (KT-FT) 38122 35686  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ027-200800-  
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER MCLEAR MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 10 20 30  
TEMP (24H TREND) 92 (+2) 73 (-1) 90  
RH % (24H TREND) 43 (-8) 91 (+3) 49  
20FTWND-VAL/AM(MPH) E 12 E 11  
20FTWND-RDG/PM(MPH) SE 12 E 7 SE 13  
MIXING HGT(FT-AGL/MSL)6132 5496  
TRANSPORT WND (MPH) SE 13 SE 14  
VENT RATE (KT-FT) 68245 67755  
DISPERSION 5 5  
DSI 6 4 6  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
VIZ001-200800-  
SAINT THOMAS AND SAINT JOHN-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 30  
TEMP (24H TREND) 86 (0) 74 (-2) 86  
RH % (24H TREND) 61 (-2) 90 (+6) 60  
20FTWND-VAL/AM(MPH) E 12 SE 13  
20FTWND-RDG/PM(MPH) SE 12 E 11 SE 12  
MIXING HGT(FT-AGL/MSL)2690 2749  
TRANSPORT WND (MPH) SE 17 SE 16  
VENT RATE (KT-FT) 41654 38486  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
VIZ002-200800-  
ST CROIX-  
354 AM AST SUN MAY 19 2019  
 
TODAY TONIGHT MON  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 30 30  
TEMP (24H TREND) 86 (-1) 74 (0) 87  
RH % (24H TREND) 63 (0) 92 (+1) 59  
20FTWND-VAL/AM(MPH) E 11 E 12  
20FTWND-RDG/PM(MPH) SE 11 E 11 SE 11  
MIXING HGT(FT-AGL/MSL)2597 2803  
TRANSPORT WND (MPH) E 18 SE 16  
VENT RATE (KT-FT) 40590 40220  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 

 
 
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